Results 51 to 60 of about 58,987 (131)

Strong disorder renormalization group on fractal lattices: Heisenberg models and magnetoresistive effects in tight binding models

, 2005
We use a numerical implementation of the strong disorder renormalization group (RG) method to study the low-energy fixed points of random Heisenberg and tight-binding models on different types of fractal lattices.
B. B. Mandelbrot, B. Douçot, B. Douçot, E. Westerberg, F. Iglói, F. Iglói, H. Bouchiat, M. Büttiker, R. Mélin, V. L. Nguyen, V. L. Nguyen, V. L. Nguyen, V. L. Nguyen   +12 more
core   +2 more sources

Stability of Coalescence Hidden variable Fractal Interpolation Surfaces

, 2009
In the present paper, the stability of Coalescence Hidden variable Fractal Interpolation Surfaces(CHFIS) is established. The estimates on error in approximation of the data generating function by CHFIS are found when there is a perturbation in ...
Chand A. K. B., Chand A. K. B., G. P. KAPOOR, Lung C. W., Mandelbrot B. B., Massopust P. R., Nonnenmacher T. A., Osborne A. R., SRIJANANI ANURAG PRASAD, Takayasu H., Voss R. F., Voss R. F.   +11 more
core   +1 more source

On the Martínez–Kaabar Fractal–Fractional Reduced Pukhov Differential Transformation and Its Applications

Mathematics
This paper addresses the extension of the Martinez–Kaabar fractal–fractional calculus (simply expressed as MK calculus) to the context of reduced differential transformation, with applications to the solution of some partial differential equations. Since
Francisco Martínez, Mohammed K. A. Kaabar   +1 more
doaj   +1 more source

Fractal Scaling of Storage Capacity Fluctuations in Well Logs from Southeastern Mexican Reservoirs

Fractal and Fractional
This study focuses on a hydrocarbon reservoir located in southeastern Mexico. The analysis uses well log data derived from petrophysical evaluations of storage capacity.
Sergio Matias-Gutierres, Edgar Israel García-Otamendi, Hugo David Sánchez-Chávez, Leonardo David Cruz-Diosdado, Roberto Cifuentes-Villafuerte   +4 more
doaj   +1 more source

DFC-LSTM: A Novel LSTM Architecture Integrating Dynamic Fractal Gating and Chaotic Activation for Value-at-Risk Forecasting

Mathematics
Accurate Value-at-Risk (VaR) forecasting is challenged by the non-stationary, fractal, and chaotic dynamics of financial markets. Standard deep learning models like LSTMs often rely on static internal mechanisms that fail to adapt to shifting market ...
Yilong Zeng, Boyan Tang, Zhefang Zhou, Raymond S. T. Lee   +3 more
doaj   +1 more source

The Effect of Prostration (Sajdah) on the Prefrontal Brain Activity: A Pilot Study

Basic and Clinical Neuroscience, 2019
Introduction: “Sajdah”, a prostration position, is part of Muslim daily prayers. It seems to have several effects on the brain and heart function. This study aimed to investigate the prefrontal brain activity after 10 seconds of Sajdah in the direction ...
Fateme Yousefzadeh, Gila Pirzad Jahromi, Ehsan Mokari Manshadi, Boshra Hatef   +3 more
doaj  

Riemann–Liouville Fractional Calculus of Nonlinear Hidden Variable Recurrent Fractal Interpolation Functions Based on Rakotch Contraction

Journal of Function Spaces
In this paper, we study Riemann–Liouville fractional calculus of nonlinear hidden variable recurrent fractal interpolation function (HVRFIF) constructed based on Rakotch contraction, which is a generalization of Banach contraction.
Chung-Il Ro, Chol-Hui Yun, Song-Chol Kwon, Un-Ryong Rim   +3 more
doaj   +1 more source

Simulación numérica de reacciones químicas catalizadas.

Momento, 2007
The kinetics of the 2CO + O2 -> 2CO2 reaction on Pt(100) nanoparticles was studied using the Monte Carlo simulation method. These particles present surfaces with (1×2) and (1×1) structures, which correspond to α and β phases, respectively.
L. D. López Carreño, G. Núñez
doaj  

On the Application of Mann-Iterative Scheme with h-Convexity in the Generation of Fractals

Fractal and Fractional
Self-similarity is a common feature among mathematical fractals and various objects of our natural environment. Therefore, escape criteria are used to determine the dynamics of fractal patterns through various iterative techniques. Taking motivation from
Asifa Tassaddiq, Muhammad Tanveer, Muhammad Zubair, Muhammad Arshad, Carlo Cattani   +4 more
doaj   +1 more source

Fractality of certain quantum states

, 2001
We prove the theorem announced in Phys. Rev. Lett. {\bf 85}:5022, 2001 concerning the existence and properties of fractal states for the Schr\"odinger equation in the infinite one-dimensional well.Comment: Latex2e with svjour ...
Wojcik, Daniel, Zyczkowski, Karol
core   +1 more source